/Engine/Source/Runtime/Datasmith/DatasmithCore/Public/DatasmithSceneFactory.h
Creates an ExpressionInput from the given type. Warning: This function's main purpose is to allow the creation of serialized expression inputs. It should not be used to add inputs to a material expression.
static [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IDatasmithExpressionInput](API\Runtime\DatasmithCore\IDatasmithExpressionInput) > CreateExpressionInput ( const TCHAR * InName )